Data values are twice as high

[magic-eightball]

Hello,
I have a weird issue with my two DHT22s: from time to time the data given is exactly twice as high as some seconds before:

I already tried different gpio pins, different DHT22s, tripple checked the wiring (the hardware should be ok).
Raspian Jessie 2017-07-05 on RP3B
Any ideas?
Thanks in advance!

[gmanic]

I had the same problem just lately. It seems that a bit is incorrect, might be a timing issue. I implemented a completely different function to read the bits and better adjust to timing issues.
See my forked repo.